LibWeb/WebGL: Implement framebufferTexture2D

Author: https://github.com/Lubrsi
Commit: https://github.com/LadybirdBrowser/ladybird/commit/135facb1b5a
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/2791
Reviewed-by: https://github.com/gmta
Reviewed-by: https://github.com/shannonbooth

Libraries/LibWeb/WebGL/WebGLRenderingContextBase.idl

@@ -98,7 +98,7 @@ interface mixin WebGLRenderingContextBase {
     undefined finish();
     undefined flush();
     [FIXME] undefined framebufferRenderbuffer(GLenum target, GLenum attachment, GLenum renderbuffertarget, WebGLRenderbuffer? renderbuffer);
-    [FIXME] undefined framebufferTexture2D(GLenum target, GLenum attachment, GLenum textarget, WebGLTexture? texture, GLint level);
+    undefined framebufferTexture2D(GLenum target, GLenum attachment, GLenum textarget, WebGLTexture? texture, GLint level);
     undefined frontFace(GLenum mode);
 
     undefined generateMipmap(GLenum target);